console.log(module.exports===exports);
const circle=require("./08_commonjs_circle");
console.log(`圆的面积:${circle.area(4)}`);
const circle_area=require("./08_commonjs_circle").area;
console.log(`圆的面积:${circle_area(4)}`);
const {area}=require("./08_commonjs_circle");
console.log(`圆的面积:${area(4)}`);
const square=require("./08_commonjs_square");
console.log(`正方形的面积:${square.area(4)}`);
const {area:square_area}=require("./08_commonjs_square");
console.log(`正方形的面积:${square_area(4)}`);
